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(CNN) – The U.S. raised the terror alert in July because of al Qaeda splinter group known as Khorasan.
Just how close did this relatively unknown terrorist group actually come to pulling off an attack on the homeland, and is there anything that can be done to stop a group with these capabilities?
CNN national security analyst Juliette Kayyem, and former NCIS special agent Robert McFadden, now vice president of the Soufan Group discuss in the video above.